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Origin of the characid fish genus Bramocharax and a description of a second, more primitive, species in Guatemala

by: Rosen, Donn Eric, 1929-1986

Publication date: 1972

Topics: Bramocharax baileyi, Fishes, Bramocharax, Origin, Phylogeny, Dispersal, Bramocharax baileyi -- Classification, Fishes -- Guatemala -- Alta Verapaz -- Classification, Bramocharax -- Origin, Bramocharax -- Phylogeny, Fishes -- Dispersal -- Central America

Publisher: New York, N.Y. : American Museum of Natural History

Collection: americanmuseumnaturalhistory; biodiversity

Contributor: American Museum of Natural History Library

Language: English

Rights: http://biodiversitylibrary.org/permissions

Rights-holder: American Museum of Natural History Library

Volume: no. 2500

Item Size: 19.6M

21 p. : 24 cm

"A new species of the characid fish genus Bramocharax is described from a karst region along the northern foothills of the Sierra de ChamaМЃ in Guatemala. The region is characterized by sinks and caverns into which streams of various sizes disappear. The points of emergence or hydrographic relationships of these streams are not always evident, but the ichthyofaunal evidence presented helps to tie some of them to two of the major tributaries of the RiМЃo Usumacinta system. The phyletic relationships of the three presently known forms of Bramocharax (the species being described here and the two subspecies of bransfordi) are analyzed. The zoogeographic inferences drawn from the proposed phylogeny are that the genus Bramocharax arose in the RiМЃo Usumacinta system and then spread southward to the RiМЃo San Juan system of Nicaragua and Costa Rica. The populations of Bramocharax inhabiting lakes Nicaragua and Managua are identified as historically the most recently established"--P. [1]

Title from caption

"August 21, 1972."

Specimens collected by the author and Reeve M. Bailey

Includes bibliographical references (p. 21)

Abstract: 'A new species of the characid fish genus Bramocharax is described from a karst region along the northern foothills of the Sierra de ChamaМЃ in Guatemala. The region is characterized by sinks and caverns into which streams of various sizes disappear. The points of emergence or hydrographic relationships of these streams are not always evident, but the ichthyofaunal evidence presented helps to tie some of them to two of the major tributaries of the RiМЃo Usumacinta system. The phyletic relationships of the three presently known forms of Bramocharax (the species being described here and the two subspecies of bransfordi) are analyzed. The zoogeographic inferences drawn from the proposed phylogeny are that the genus Bramocharax arose in the RiМЃo Usumacinta system and then spread southward to the RiМЃo San Juan system of Nicaragua and Costa Rica. The populations of Bramocharax inhabiting lakes Nicaragua and Managua are identified as historically the most recently established'--P. [1].